Means for holding together parts having telescopic engagement



April 4, 1933. c. l..v WINGARD 1,903,353

MEANSI FOR HOLDNG TOGE'IHR PARTS HAVING TELESCOPIC ENGAGEMENT Y Filed Nov. 17, 19:50 2 sheets-sheet 1 2 l? .7 j j 916x 5 amante@ April 4, 1933. c. L. wlNGARD 1,903,353

MEANS FonnoLDINe TOGETHER PARTS HAVING 'rELrsscciPIc- ENGAGEIENT v File-d Nov. 17, 1930 2 sheets-sheet 2 www,

length to the unreduced portion of the slots 3. The slots 4 and 3 receive the keys 6, the construction of which is best shown in Figures 6, 7, 8 and 9, the key of Figure 6 being the one shown in Figures 1, 2, 3 and 5.

Each key comprises an elongated body of a length approximately equal t0 that of theV slot 4 and fits the slot with a sliding lit. The body of the key 6 has inclined or tapered side walls 7 to tit the inclined side walls 20 of the slot 4.. Vf hen placed in the slot 4 the key 6 will enter a registering slot 3 (see Figure 2) and the key has that end, which is adjacent the reduced portion 5 of the slot,'recessed with straight or parallel walls as at 8 to leave a tongue 9 for entering the slot portion 5 'when the male and female members are pulled in a direction tending to separate them. SinceI the side walls of the slot extension 5 and the corresponding walls of the tongue 9 are parallel, i. e., not tapered as are the walls 20 and 7, rotation of the male and female members with respect to one another on their common axis cannot occur and as the abutting ends of the key 6 and the wall of the slot extension 5 are not inclined (as is the opposite end 10 of the key 6) ,the male .and female members cannot be pulled apart.

In order to separate the male and female members it is necessary first. to press them together lengthwise in order to bring the slot extension 5 out of the recesses 8 of the key, then by rotating the male and female members one around the other (see Figure 3) the key or keys will ride out of the slots 3 onto the periphery of the male member, whereupon the male and female members may be pulled apart. r As illustrated in Figures 1, 2, 3 and 5 the female member 2has an outer annular groove 11 whoseside walls are preferably parallel in order to retain a split spring band 14 which embraces the key or keys and continuously tends vto force them to the locking position. The band 14 may have a bent-over or hook end 13 to lie in the slot 12in the female member (see Figs. 1 and 2) which prevents the bandl swivelling in its groove, or the ends of the band may simply abut a bar or ridge 12g formed across the groove (see Fig. 3).

In order to limit the telescopic movement of the male member into the female member, any suitable stop or stops 15 may be provided, the object being to limit the inward movement so that when at its extreme the slots 4 and 3 will exactly register.

Lacasse ber 2 so as to be projectible over the band 14- and hold it against expanding suciently to allow the keys to be released, i. e., to assume the position of Figure 3. The ferrule 18 may be moved into positio-n over the band 14 in any desired way as by hand or by gravityl and when desired a sui-table stop 19 may be provided for holding the ferrule against moving past the band 14 or off the female member. The ferrule may be split if desired and caused to grip the female member with suficient friction and to hold it against accidental displacement.

In order that the male member may pass the key in entering the female member, either the end of the male member must be bevelled or the adjacent end of the key ymust bel bevelled. Then the male member is a thin tube I prefer to place the bevel on the end of the key, see 10 in Figures 1 and 6.

Should it be desirable to lock the male and female members together both against longitudinal and rotational movement relatively one tothe other, I use a key such as is shown in Figure 7. By reference to this ligure it will be seen that the portion of the key 24 which enters the slot 3 has its side walls 26 and its inner end Wall parallel to the Walls' of the slot proper 3 and no recesses, .such as the recesses 8, `are provided in this key. That part of the key which lies in the slot 4 has its side walls bevelled as at 25 to fit the bevels 20 while the ends of the key are straight as ythe depth of the key is only the combined thickness of the walls of the male and female members l and 2, see Figures 1, 2 and 3.. lVhen, however, it is not necessary to keep the inside entirely free of projections, I may use. the key shown in Figures 8 and 9, by reference to Which figures, it will be observed that the key 21 has its recesses formed as longitudinal grooves 22 inthe sides. This leaves an overhanging portion at 23 to underlie the male member at the side of the eXtensionl 5 of the slot 3 and prevents the key from riding up even though the spring band 14 is not present or has become weakened.

Instead of the keys and spring band being carried by the female member, a reversal of the parts may be employe'dland the spring band and vkeys located inside the male member, thus leaving the outer surface of the Y female member free of interruptions, such a c function as corresponding parts in Figure 1,

bear the same reference numerals 'plus the index letter m. As the reversal is an obvious one and is clearly illustrated in Figure 14, further description thereof is thought to be unnecessary.

Referring now to sheet 2 of the drawings and particularly to Figures to 12 inclusive, I have shown a modification of the invention in its applicationto a bobbin or spool mounted on a spindle. For example the spindle may be one of a typewriter ribbon feed and the bobbin may be a typewriter ribbon carrier, or the spindle may be that of a spinning machine and the bobbin the yarn or thread carrier, the specific use being imma.- vterial. ln these figures, Figures 10 to 13 inclusive, 28 represents the bobbin or spool whose tubular hub 29 has a longitudinal slot 30 to receive one of the locking ribs 39 or 40 of the spring band 38 which encircles the hub 29. The locking rib or key 39 is preferably of the same length as the slot 30 while the other one i0 is shorter in order to allow more longitudinal movement, when the` key 40 is placed in the slot, between the spindle and bobbin than when the longer key 39 1s placed in the slot.

if found desirable the bobbin 28 may be provided with a helical spring 32 anchored at 31 in one end of the hub 29 in order that it may be engaged by the point 41 of the spindle shaft 34 so as to keep the locking key 39 or 40, as the case may be, in the straight walled portion 37 of the groove or slot 35 of the spindle shaft 34, the remainder of the groove or slot 35 having its side walls bevelled or curved as at 36 so that when the bobbin 28 and spindle 33 are pushed together against the tension of the spring 32 to withdraw the key from the slot portion 37, the male and female members (spindle and bobbin) may be turned with respect to themselves to bring the key out of the slot or groove 35 and enable the said members to be separated.

When the structure shown in Figures 1G to 13 inclusive is employed, the thread or ribbon to be wound on the bobbin may have its end caught under the portion 40 (or 39 accordingly as 39 or 40 is adjusted to lie in the slot 30) and held thereby as a clasp.

The male member may be of any desired length and in either of the embodiments of the invention it may be provided with a series of 1slots 3, 30, 48, etc. spaced apart longitudinally so that the members may be secured togetherwith the male member at different distances within the female member.

Other modifications of the invention will be obvious to those skilled in the art and may be made under the scope of the invention as expressed in the appended claims.

What I claim is .1. Means for securing the joints of male and female members together, which means comprises a spring band carried by one of said members, a locking member cooperating with said band, each said male and female member having provisions in part to receive said locking member whereby said locking member will hold said joint against separation, said members being arranged to be brought together and locked by said locking member upon insertion of the male member into the female member with rectilinear movement along the axes of the members, and means 'which upon relative rotation of said male and female members on their axes will cause said locking member to become released to provide for separation of said male an female memberswhcn desired.

2. Means for securing the joints of male and female members together, which means comprises a spring band carried by one of said members, a locking member coo erating with said band, each said male an female member having provisions in part to receive said locking member whereby said locking .member will hold said joint against separa tion, said provisions comprising a slot in the female member through which said locking member may in part project, and a recess in the male member to receive the projecting part of said locking member, said members being arranged to be `brought together and locked by said locking member upon insertion of the male member into the female member with rectilinear movement along the axes of the members, and means which upon relative rotation of said male and female members on their axes will cause said locking member to become released to provide for separation of said male and female members when desired.

3. Means for holding malel and female parts together, the same comprising in combination with a tubular female element and a .male element associated therewith, one of said elements having a slot, a locking key located in said slot, the other of said elements having a seat into which said key may project to hold said male and female` elements tion of said male and female members on their axes will cause said locking member to become released to provide for separation of said male and. female members when desired.

4. Means for holding male and female parts together, the same comprising in combination with a tubular female element and v a male element associated therewith, one of to render same non-yieldable,

said elements having a slot, a locking key located in said slot, the other of said elements having a seat into which said key may project to hold said male and female elements against pulling apart, and a yieldable means continuously tending to hold said key to its seating position, and another means engageable with said yieldable means when desired said members being arranged to be brought together and locked by said locking member upon insertion of the male member into the female member with rectilinear movementalong the axes of the members.

5. Means for holding male and female parts together, the same comprising in combination with a tubular female element and a male element associated therewith, one of said elements having a slot, a locking key located in said slot, the other of said elements having a seat into which said key may project to hold said male and female elements against pulling apart, and a vieldable means continuously tendingI to hold said key to its seating position, said yieldable means comprising a split band spring, said members bef ing arranged to be brought together and locked by said locking member upon insertion of the male member into the female member with rectilinear movement along the aires of the members and means which upon rela-tiva rotationl of said male and female members on their axes will cause said locking member to become released to provide for s separation of said male and female members when desired.

6. Means for holding male and female parts together, which parts are arranged to be brought together and separated by recti i linear movement along the axis of, the mem- -bers, the same comprising 1n combination with a ti1bulaifema-le element and a male element associatedtherewith, one of said elements having a slot, a locking key located in said slot, the other of said elements having a seat into Awhich said key may project to hold said male and female elements against pulling apart, a yieldablemeans continuously tending to hold said key to its seating position,

said yieldable means comprising a split band spring, and a ferrule to fit over said band spring and hold. it rigid when desired.

7. Means to hold male and female parts together, which means comprises in combination with engaging male and female elements; a locking key and a band spring cooperating therewith, said male and female elements having provision to receive said key between them, said members being arranged tion with engaging male and female ele-` ments; a locking key, said male element having key receiving and retaining slots and an annular groove associated with said slots, a band spring in said groove and embracing said key to part-ly project said key toward the male element, said male element having a slot to receive said key, said members being arranged to be brought together and locked by said locking member upon insertion of the male member into the female member with 4rectilinear movement along the axes of the members, and means Which upon rela'- tive rotation of said maleand female members on their axes Will cause said locking ymember to become released to provide for separation of said male and `female members when desired.

9. Means to hold male and female parts together, which means comprises in combination with engagingmale and female elements; a locking key', said male element having key receiving and retaining slots and an annular groove associated with said slots, a band spring in saidy groove and embracing said key, to partly project said key toward the male element, said male. element having a slot to receive said key and means to anchor one end of said spring to the element Which carries it.

l0. Means to hold male and female parts together, which means comprises in combi- ,nation with engaging male and female elements; a locking key, said male element having key-receiving and retaining slots and an annular groove associated with said slots, a band spring in said groove and embracing said key to partly project said key toward the male element, said male element having a slot to receive said key, and having a reduced extension to fit said slot, said key having recesses at one end providing a tongue to lit said extension When the male and female elements are pulled in a direction tending to separate them.`

ll. Means to hold male and female' parts together, which means comprises` in combination with engaging male and female elements; a locking key, said male element hav ing key receiving and retaining slots and an annular groove associated with said slots. a band spring in said groove and embracing said key to `partly project said key toward .separate them, said recesses comprising side grooves in the key to receive the male member and interlock therewith and to hold said key againstmovement radially. f c

12. Means to hold male and female parts together, which means comprises in combination with engaging male and female elements; a locking key, said male element having .key receiving and retaining slots and an annular groove associated with said slots, a band spring in said groove and embracing said key to partly project said key toward the male element, said male element having a slot to receive said key, and means continu ously tending to separate said male and female parts. Y

13, Means to hold male and female parts together, 'which means comprises in combination with engaging maleand female elements; a locking key, said male element having key receiving and retaining slots and an annular groove associated with said slots, a band spring in said groove and vembracing said key, means to anchor one end of said band s ring to partly project said key toward t e male element, said male element' having a slot to receive said key, and means v continuously tending to separate said male and female parts.

14. Means to hold male and female parts together, which means comprises in combination with engaging male 'and female elements; a lockingkey, said male element having key receiving and retaining slots and an annular groove associated with said slots, a band spring in said groove and embracing said key to partly project said key toward the male element, said male element having a slot to receive said key, and having a reduced extension to t said slot, lsaid key having recesses at one end providing a. tongue to fit said extension when the male and female elements are pulled in ,a direction tending to separate them, and means continuousl ly tending to separate said male and female parts.

15. Means to hold male and female parts together, which means comprises in combination with engaging male and female elements; a locking key, said male element having key receiving and retaining slots and an annular groove associated with said slots, a band spring'in said groove and embracing said key to partly project said ke toward the male element, said male element liaving a slot to receive said key, and having a reduced extension to fit said slot, said key having recesses at one end providin a tongue "to fit t5 \said extension when the ma e and femalev elements are pulled in a direction tending to separate them, said recesses comprising side grooves in the key to receive the male merner and interlock therewith and to hold said key against movement radially, and'meansl continuously tending to separate said male and female parts.

16. Means to hold male and female parts together, which means comprises in combination with enga ing male and female .elements; ,a locking 'ey and a band spring co1 operating therewith, said male and female elements having provision to receive said key between them,'and the aforesaid structure including means whereby upon rotation of said male and female parts with respect one to the other, said key will be released from its locking position to enable said male and female parts to be separated.

' 17. A pair of bodies, one having an internal tu ular hub and the other having an internal spindle adapted, when said bodies are brought together, to enter and be received by said hub as a male and female joint, and means within said body operating upon the male and female joint bein made to lock the bodies together, the slot 1n the male element being longer than said locking meml ber and having a portion not less than the length of said locking member rounded oi and the remaining portion squared so that when the locking member lies projected into said squared portion the bodies cannot be rotated with respect to one another and when said bodies are moved relatively along their axes to bring said locking member wholly into said rounded ed' portion of the slot, rotation may be eifected to release the lock.

18. Means for securing the joints of male and female members togethenwhich members are arranged to be brought together and locked by a rectilinear movement along the axes of themembers and unlocked by a relative rotary movement of the members around their axes, which means comprises a spring band carried by one of said members, a lockin member coo erating with said band, each said male and emale member having provisions in part to receive said locking member whereby said locking member will hold said joint against separation by a pull in the direction of the axes, said locking member having provisions for. releasin itself from lockingengagement upon relatlve rotation of the male andfemale members on their axes.

19. Means for securing the joints of male and female members together, which members are arranged to be brought together and locked by a rectilinear movement along the axesof the members and unlocked by a relative rotary movement of the members around their axes, which means comprises a spring band carried by one of said members, a locksions in part to receive said locking member' Wherebysei locking member will hold saicl joint against separation by a, pull in the direction of the axes, said locking member 'he-ving provisions for eleasing itself from locking engagement upon relative rotation of the male and female members on their axes, yand. a fem'ule adapted to be moved into position over said spring band to hold it against yielding to retain the male and female members against being unlocked by 'the aforesaid rotnrymovement.

CHARLES LE@ WNGARD. 

